Relationship between the attributes consists of nominal, polynominal and numerical data

azziaty256

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<context>
<input/>
<output/>
<macros/>
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<operator activated="true" class="process" compatibility="6.0.002" expanded="true" name="Process">
<process expanded="true">
<operator activated="true" class="retrieve" compatibility="8.2.001" expanded="true" height="68" name="Retrieve 8 Data Cleaning test 3" width="90" x="112" y="34">
<parameter key="repository_entry" value="8 Data Cleaning test 3"/>
</operator>
<operator activated="true" class="concurrency:correlation_matrix" compatibility="8.2.000" expanded="true" height="103" name="Correlation Matrix" width="90" x="447" y="238">
<parameter key="include_special_attributes" value="true"/>
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<connect from_op="Retrieve 8 Data Cleaning test 3" from_port="output" to_op="Correlation Matrix" to_port="example set"/>
<connect from_op="Correlation Matrix" from_port="example set" to_port="result 2"/>
<connect from_op="Correlation Matrix" from_port="matrix" to_port="result 1"/>
<portSpacing port="source_input 1" spacing="0"/>
<portSpacing port="sink_result 1" spacing="63"/>
<portSpacing port="sink_result 2" spacing="21"/>
<portSpacing port="sink_result 3" spacing="147"/>
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</operator>
</process>

sgenzer

hello @azziaty256 - welcome to the community! Yes you can only use Correlation Matrix with numerical attributes as it is simply calculating pairwise r (or r^2 if you choose) correlation coefficients. It would be rather odd to calculate r (or r^2) between nominal / polynominal attributes as they are not numerical. I would recommend rethinking exactly what you are trying to do. 

 

Scott